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Measurement and Instrumentation

Measurement and Instrumentation
Figure show an RC potentiometer to measure AC voltage. It is desire that Vo/Vi should be independent of frequency. The value of C shoud be

 0.1 µF.
 11 µF.
 10 µF.
 0.09 µF.

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 3) A
 (400 ± 2.24) A
 (400 ± 1) A
 (400 ± 1.5) A

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Measurement and Instrumentation
The errors introduced by an instrument fall in which category ?

 Gross errors
 Systematic errors
 Random errors
 Environmental errors

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured I1 = 150 ± 3A , I2 = 250 ± 4 A, where the limits of error are given as standard deviations. I is measured as

 (400 ± 3) A
 (400 ± 1) A
 (400 ±5) A
 (400 ± 2.24) A

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Negligible
Negative
Positive
None of the listed here

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Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 3 mA.
 2 mA.
 1 mA.
 4 mA.

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